When one delagate in a parallel step fails, the flow continues without waiting
for the last reply
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Key: UIMA-1355
URL: https://issues.apache.org/jira/browse/UIMA-1355
Project: UIMA
Issue Type: Bug
Components: Async Scaleout
Reporter: Burn Lewis
Fix For: 2.3S
When a delegate in a parallel step fails the number of replies received is
incremented twice, so the reply from the last delegate is not merged into the
CAS. When it is received it will reenter the flow if the CAS is still active,
causing even more trouble.
I have a test case that demonstrates the problem.
Also we should make the check for all-replies-received atomic so that only one
reply- or error-processing thread will send the CAS on to the next step, or,
depending on the error-handling, discard the CAS or terminate the service.
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